Eimless



.(No Model.)

J. G. MISSIMER. RIMLESS SPEGTAGLES 0R EYEGLASSES. No. 450,177.

Patented Apr. 14,1891.

M l I v- I I ENS 10., PNOTDJJTND WASHIN TON D C UNITED STATES ATENT FFI a JACOB G. MISSIMER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JAMES \V. QUEEN & CO, OF SAME PLACE.

'RIMLESS SPECTACLES OR EYEGLASSES.

SPECIFICATION forming part of Letters Patent No. 450,177, dated April 14, 1891.

Application filed $eptember 5, 1890. Serial No. 364,008- (No model.)

To all whom it may concern.-

Be it known that I, J AOOB G. MISSIMER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Rimless Eyeglasses; and I do declare the following to be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part ofthis specification.

. This invention relates to certain new and useful improvements in rimless eyeglasses and spectacles of that class where the straps are affixed to the lens by an adhesive substance.

The purpose of the present invention is to secure the strap to the lens without weakening the same in the least and without the intervention of rims, rivets, or other mechanical appliances which would tend to weaken the same or add weight to it.

The improvement consists, essentially, of a strap secured to the lens bya suitable cementitious or adhesive material, the sides or faces and edges of the lens being roughened at the points at which the portions of the strap are in contact therewith, so to cause the bind ing medium to adhere more closely to the lens.

The essential feature of the present invention consists in grinding or otherwise roughening the faces of the lens at the points at which the strap or clamp is placed, so as to afford a suitable surface for the reception of the cement used in holding the strap in place.

tached. Fig. 3 is a detail perspective view of the strap. Fig. 4 is a section on linear w of Fig. 1.

The strap A is designed to connect the earwires, the nose-piece, or the finger-piece with the lenses, and is constructed to straddle or embrace the edges of the lens, being provided with parallel or approximately parallel jaws a a, which extend on each side of and embrace the edges of the lens. The oppositelyprojecting points I) I) obtain a purchase on the rim of the lens and add to the stability of the strap-fastening.

In practice the strap is applied to the lens, the jaws Ct a embracing the sides thereof, and is secured in place by a suitable cement or other adhesive substance adapted to the purpose, said cement serving as a binding medium between the lens and the strap. To obtain the best results, the sides or edge of the lens must be roughened, as shown at (l in Fig. 2 of the drawings, at the point at which it is proposed to secure the strap, said roughening being secured in any suitable manner, as by grinding. This roughening of the lens forms a plurality of depressions into which the cement seats itself, and' movement of the strap is prevented. The points or and b, being at right angles to each other, serve, in connection with the depressions formed by the roughening of the lens, to effectually pre- Vent any movements of the straps on the lens, each serving as a brace to the other. The ear or lug 0 extends on a curve from the point of junction of the points a and b, and is integral therewith, being apertured for the attachment of the ear-wire.

I am aware that it has been proposed to cement straps to the lens of an eyeglass; butin such construction the strap has embraced the lens upon only two opposite sides, corresponding to my points ct a; but, owing to there being-no provision for resisting the strain which is bound to be brought on the points in use, the strap very soon works loose. I have found that by the employment of the points I; b at right angles to the points Ct at and cementing them as well as the said points a a, I provide a construction in which in any or all directions is resisted, and the strap Will not work loose.

It is deemed of special importance thatthe lenses be ground as above described, for, in addition to forming depressions into which the cement embeds itself, the grinding forms a secure seat for the jaws a a and greatly aids in the firm holding of the straps to the lenses.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The improved spectacles herein described, consisting of the lenses ground upon opposite faces and forming depressions, the outer straps having portions (1 b embracing the sides and rims of the lenses and cemented thereto, with the portions a seated in said I5 depressions, and the nose-piece formed with integral portions CL and Z), embracing the sides and rims of the lenses and cemented to both the sides and rims, with the portions a seated in the depressions of the lenses, substantially 20 as and for the purpose described.

In testimony whereof I affix my signature in presence of two Witnesses.

JACOB G. MISSIMER. Witnesses:

W. O. HEMPSTEAD, L. M. SMITH. 

